diff --git a/WinFormControl/UWeightControl.cs b/WinFormControl/UWeightControl.cs
index b22e66d..c97fdad 100644
--- a/WinFormControl/UWeightControl.cs
+++ b/WinFormControl/UWeightControl.cs
@@ -34,7 +34,6 @@ namespace WinFormControl
     public UWeightControl()
     {
       InitializeComponent();
-      weightSwitch.FlatAppearance.BorderColor = Color.FromArgb(45, 155, 214);
     }
 
     [Browsable(false)]
@@ -92,22 +91,18 @@ namespace WinFormControl
         ChangeWeightBtnState();
         throw;
       }
+      finally
+      {
+        this.Focus();
+      }
     }
 
     void ChangeWeightBtnState()
     {
       if (switchOn)
-      {
-        weightSwitch.BackgroundImage = Resources.onclickBtn;
-        weightSwitch.ForeColor = Color.White;
         weightSwitch.Text = "停止称重";
-      }
       else
-      {
-        weightSwitch.BackgroundImage = Resources.simpleBtn;
-        weightSwitch.ForeColor = Color.Black;
         weightSwitch.Text = "启用称重";
-      }
     }
 
     void OpenSerialPort()